/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraComponent.h
Sets the simulation cache to use for the component. A null SimCache parameter will clear the active simulation cache. When clearing a simulation cache that has been running you may wish to reset or continue, this option is only valid when using a full simulation cache. A renderer only cache will always reset as we can not continue the simulation due to missing simulation data.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=SimCache) void SetSimCache ( [UNiagaraSimCache](API\Plugins\Niagara\UNiagaraSimCache) * SimCache, bool bResetSystem )